- vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26376] SDSS J080303.90+251627.0 likely superoutburst
by Taichi Kato 02 Nov '21

02 Nov '21

SDSS J080303.90+251627.0 likely superoutburst YYYYMMDD(UT) mag observer 20211022.4013 19.935zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211023.8340 <160c (Yutaka Maeda) 20211024.4928 18.700zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211025.8186 <160c (Yutaka Maeda) 20211026.8147 <147c (Yutaka Maeda) 20211027.8322 <151c (Yutaka Maeda) 20211028.8188 155:cG (Yutaka Maeda) 20211029.8513 <132c (Yutaka Maeda) 20211031.5075 15.834zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26375] ZTF17aaaobyl likely superoutburst
by Taichi Kato 02 Nov '21

02 Nov '21

ZTF17aaaobyl likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20211031.4967 17.920zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26374] CRTS J050124.1+203818 superoutburst
by Taichi Kato 02 Nov '21

02 Nov '21

CRTS J050124.1+203818 superoutburst YYYYMMDD(UT) mag observer 20211023.7290 <153c (Yutaka Maeda) 20211025.7137 154:c (Yutaka Maeda) 20211026.7107 <143c (Yutaka Maeda) 20211027.7281 154:c (Yutaka Maeda) 20211028.7142 149:cG (Yutaka Maeda) 20211029.7277 <147c (Yutaka Maeda) 20211030.4550 15.330zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26373] ASASSN-19ar bright outburst
by Taichi Kato 02 Nov '21

02 Nov '21

ASASSN-19ar bright outburst YYYYMMDD(UT) mag observer 20211030.3503 15.599zr (Zwicky Transient Facility Lasair (Masci+ 2019)) Long outburst in ZTF data in 2018 Sep.-Oct. (superoutburst?) The current outburst is as bright.

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[vsnet-alert 26372] ASASSN-15cu outburst
by Taichi Kato 02 Nov '21

02 Nov '21

ASASSN-15cu outburst UG+E. Subtype not determined yet. Relatively bright outburst. YYYYMMDD(UT) mag observer 20210915.4985 20.357zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211011.5028 18.842zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211030.4700 15.760zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26371] ASASSN-21tq: likely superhumps
by Taichi Kato 01 Nov '21

01 Nov '21

ASASSN-21tq: likely superhumps Itoh-san, Kiyota-san, Berto Monard and Josch Hambsch have reported observations. The most recent data (since Oct. 28) seem to show superhumps with a period of 0.0588(1) d and an amplitude of 0.10 mag. The data were not in very good quality (weather condition) and further data are needed for confirmation.

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[vsnet-alert 26370] Gaia21efs: likely CV (dwarf nova?)
by Taichi Kato 31 Oct '21

31 Oct '21

Gaia21efs: likely CV (dwarf nova?) Tonny Vanmunster reported observations. The data show 0.15 mag variations (flickering or part of early superhumps?). The object is thus unlikely a microlensing, but likely a CV. Spectroscopy is encouraged.

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[vsnet-alert 26369] OT J002656.6+284933 superhumps
by Taichi Kato 30 Oct '21

30 Oct '21

OT J002656.6+284933 superhumps (=CSS101212:002657+284933) Sano-san and Tamas Tordai have reported observations. 0.3-mag superhumps are clearly present.

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[vsnet-alert 26368] OT J002656.6+284933 superoutburst
by Taichi Kato 29 Oct '21

29 Oct '21

OT J002656.6+284933 superoutburst (=CSS101212:002657+284933) This object is known as an SU UMa star above the period gap with multiple rebrightenings. The last outburst was recorded in 2016. https://ui.adsabs.harvard.edu/abs/2017PASJ...69L...4K/abstract YYYYMMDD(UT) mag observer 20211013.6632 <159c (Yutaka Maeda) 20211014.6574 <167c (Yutaka Maeda) 20211015.6572 <165c (Yutaka Maeda) 20211017.6568 <158c (Yutaka Maeda) 20211023.5999 154:c (Yutaka Maeda) 20211025.5847 153cG (Yutaka Maeda) 20211026.5832 152:cG (Yutaka Maeda) 20211027.5983 153:cG (Yutaka Maeda)

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[vsnet-alert 26367] OGLE-MC-DN-0008: new SU UMa-type dwarf nova
by Taichi Kato 28 Oct '21

28 Oct '21

OGLE-MC-DN-0008: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. The object shows 0.17-mag superhumps with a period of 0.06056(8) d.

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